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Bryan Johnson@bryan_johnson• 4 months ago

six habits wrecking your sleep: + eating too late + not having a wind down routine + having stimulants too late in the day + not regulating evening light + wrong bedroom temperature + not regulating noise

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5/6/2025

Andrej Karpathy@karpathy• 4 months ago

Replying to @bryan_johnson

I'm traveling recently and it's been a lot easier for me to reach higher scores on average. I'm starting to think it's the (traffic/city) noise back in my home in SF, even with top tier ear plugs. It's possible that there is a major noise pollution epidemic where many many millions of people are sleeping badly without realizing it and that this is not taken anywhere seriously enough by local city governments.

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5/7/2025

Andrej Karpathy@karpathy• 4 months ago

Replying to @karpathy

@bryan_johnson I think it's tricky to notice when you're in half-awake states, so when you get disturbed you don't become conscious enough (or don't end up remember it enough) to make the connection later.

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5/7/2025